Phx.Greenway, Arizona Cotton Heat Stress for 2026 DOY = Day of year ns = No Stress : Stress Value less than 82.4 L1 = Stress Level 1 : Stress Value from 82.4 to 86 L2 = Stress Level 2 : Stress Value greater than 86 DOY Date Stress --- ------ --------- 121 May 1 69.8 ns 122 May 2 71.9 ns 123 May 3 74.1 ns 124 May 4 67.9 ns 125 May 5 64.6 ns 126 May 6 64.6 ns 127 May 7 71.4 ns 128 May 8 75.0 ns 129 May 9 76.4 ns 130 May 10 77.2 ns 131 May 11 78.3 ns 132 May 12 80.2 ns 133 May 13 75.9 ns 134 May 14 76.0 ns 135 May 15 75.0 ns 136 May 16 75.2 ns 137 May 17 72.7 ns 138 May 18 68.8 ns 139 May 19 68.8 ns 140 May 20 69.4 ns 141 May 21 71.4 ns 142 May 22 72.7 ns 143 May 23 75.5 ns 144 May 24 77.5 ns 145 May 25 75.8 ns 146 May 26 73.8 ns 147 May 27 71.4 ns 148 May 28 70.3 ns 149 May 29 68.8 ns 150 May 30 70.1 ns 151 May 31 74.1 ns 152 Jun 1 76.9 ns 153 Jun 2 78.9 ns 154 Jun 3 78.7 ns 155 Jun 4 81.6 ns 156 Jun 5 81.6 ns 157 Jun 6 80.0 ns 158 Jun 7 79.5 ns 159 Jun 8 77.9 ns 160 Jun 9 76.9 ns 161 Jun 10 78.0 ns 162 Jun 11 81.1 ns 163 Jun 12 83.5 L1 164 Jun 13 85.8 L1 165 Jun 14 87.1 L2 166 Jun 15 85.7 L1 167 Jun 16 85.3 L1 168 Jun 17 86.4 L2 169 Jun 18 83.6 L1 170 Jun 19 80.6 ns 171 Jun 20 79.1 ns 172 Jun 21 78.0 ns 173 Jun 22 79.7 ns 174 Jun 23 84.6 L1 175 Jun 24 85.9 L1 176 Jun 25 87.1 L2 177 Jun 26 85.3 L1 178 Jun 27 82.3 ns 179 Jun 28 79.0 ns 180 Jun 29 78.3 ns 181 Jun 30 75.9 ns 182 Jul 1 76.2 ns 183 Jul 2 76.5 ns 184 Jul 3 78.8 ns 185 Jul 4 79.1 ns 186 Jul 5 83.0 L1 187 Jul 6 84.8 L1 188 Jul 7 86.1 L2